The Insta-TEST 4 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, and Total Hardness 0-800 ppm. This test strip is a dip-n-read strip with instant results. Each bottle includes 50 test strips packaged in a waterproof Pop-Top bottle with a hinged cap. The bottle has a molded desiccant liner, which protects the strips from moisture and UV light. The Insta-TEST 4 Plus strip is ideal for spa owners who need the most critical tests for perfect water balance. This product can be purchased with English only text or trilingual (English, Spanish, French) instructions.